The U.S. Air Force Band surprised visitors at the Gaylord National Convention Center in National Harbor, Md., with a flash mob performance.
"The gift of music is a wonderful way to bring together family and friends to celebrate this time of year," the Air Force Band wrote. "The season also reminds us that the freedom we enjoy as Americans remains one of our greatest gifts."
Holiday flash mob performances have become a regular part of the band's annual schedule. The Air Force Band has had a flash mob each year since 2013.